Chair arm



FIG. 1 is a perspective view showing the left side, top and front of achair arm which forms my new design, the broken lines in this and otherfigures being for illustrative purposes and forming no part of mydesign;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The ornamental design for a chair arm, as shown and described.